Operational IO

useful IT information in small doses

At Cisco Live this year in Las Vegas, a coworker (Paul Giblin Twitter: @dreamlessod) and I decided to attended a new kind of event hosted by Cisco. The event was titled "Cisco Capture the Flag: A Full-Stack, Team-Based Competition". The competition was a structured game where teams compete…

Have you have ever been in a situation where you have been given a block of addresses by your Internet provider and you have exhausted that space by publishing services to the Internet? Yea, me too and it sucks. The typical solution would be to get a larger block from…

Introduction In certain environments it is necessary to get flow data from different places in your network for compliance or security in general. Recently I ran across a situation in which the native flow gerenators within the Cisco Nexus platform were only able to do 1 in 1000 sampling due…

Update This is an update to my original article about ELK for Network Operations. This is built on the latest version of ELK (Elasticsearch 1.5, Logstash 1.5.0.rc2, and Kibana 4) on Centos 7. What Is The ELK Stack? ELK stack is a powerful set of tools…

In the networks that I run I typically try and follow the FCAPS model. The (C)onfiguration part of that is often overlooked. I have used paid and free products, and they all work fine, but I wanted something that was simple, version controlled, and fully open source. This solution…